This is not necessarily made for mental health but still some useful information and worksheets in this free publication -
https://exectechweb.com/wp-content/uploads/2020/09/Courage-Book-Workbook.pdf
Substance Use, Mental Health, Co-Occurring Therapy | Harm Reduction | Positive Change Tools
takingtheescalator.com Substance Use and Mental Health Resources - Non 12 Step Motivational Harm Reduction Tools